United States › Illinois › Rochester CITY
Rochester Illinois · 4,093 residents (2025 est.) · 2.65 sq mi
Time machine
COMPARE TO 1990 Census 2000 Census 2009 ACS 2010 ACS 2011 ACS 2012 ACS 2013 ACS 2014 ACS 2015 ACS 2016 ACS 2017 ACS 2018 ACS 2019 ACS 2020 ACS 2021 ACS 2022 ACS 2023 ACS
The short version
Rochester is home to 3,766 people in Illinois. 93% of homes are owner-occupied. That puts it in the top 4% of US cities for household income. That is roughly 40% ahead of the Illinois median. This is an unusually credentialed place: 48% of adults have a four-year degree. The foreign-born share is 1%.
At a glance
Wealthier
above the US median
US median: $82,259
Mid-age
median age 39.8
US median: 38.9
More educated
48% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Section 01
Population & growth from 2,893 in 2000
4,093 in 2025 (Census Bureau estimate)
1,423 / sq mi
+9%since 2009
from 1,309 / sq mi in 2009
US average: 281
from 40.3 in 2000
US average: 38.9
Population, 1990 – 2024
3K 3K 3K 4K 4K 1990 2000 2010 2020 2024 Rochester Age distribution, 2024
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $117,118
+2%inflation adjusted, since 2000
from $62,891 in 2000
US average: $82,259
from $26,881 in 2000
US average: $44,673
Households earning $100K+
from 55.8% in 2009
US average: 53.3%
from 1.2% in 2000
US average: 12.5%
from 0.361 in 2010
US average: 0.476
Workforce by industry, 2024
Public administration 9.9%
Transportation & warehousing 2.5%
Professional, scientific, technical 1.8%
Education & health services 1.4%
Agriculture, forestry, fishing 0.6%
Arts, entertainment, food 0%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
$238,900
+14%inflation adjusted, since 2000
from $114,800 in 2000
US average: $376,019
$1,288
+25%inflation adjusted, since 2000
from $564 in 2000
US average: $1,442
from 90.6% in 2000
6.7% rent
from 4.5% in 2009
US average: 10.0%
from 2.73 people in 2009
US average: 2.54
from 18.9% in 2009
US average: 22.9%
from 28.6% in 2009
US average: 47.4%
from 1.9 in 2009
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity 2000
White, non-Hispanic 98%(2,834)
Hispanic / Latino 0.7%(20)
2024
White, non-Hispanic 91.6%(3,449)
from 7 in 2009
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 9 more ancestry groups with data from 44.3% in 2000
US average: 35.6%
High school or higher
from 92.9% in 2000
US average: 89.6%
from 16.2% in 2000
US average: 14.0%
Section 06
Commute & transportation from 10.3 min in 2000
US average: 26.5
from 78.8% in 2009
US average: 68.9%
from 9.0% in 2009
US average: 8.5%
from 0.0% in 2009
US average: 3.2%
from 9.0% in 2009
US average: 15.0%
from 0.0% in 2009
US average: 2.4%
from 0.0% in 2009
US average: 0.4%
from 2.8% in 2009
US average: 8.3%
Section 07
Work & employment from 3.8% in 2011
US average: 5.2%
from 69.2% in 2011
US average: 63.5%
Women 20-64 in the labor force
from 70.6% in 2020
US average: 74.6%
from 26.8% in 2009
US average: 13.1%
from 55.2% in 2009
US average: 42.5%
Section 08
People & community from 1.6% in 2009
US average: 14.1%
from 10.4% in 2009
US average: 6.2%
from 3.7% in 2012
US average: 13.3%
from 4.5% in 2013
US average: 8.4%
from 84.0% in 2017
US average: 91.0%
Computer in household
from 94.9% in 2020
US average: 95.5%
from 92.5% in 2020
US average: 87.7%
from 98.5% in 2016
US average: 77.7%
from 1.2% in 2016
US average: 13.6%
Marital status
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 4.5% in 2013
US average: 8.4%
from 76.0% in 2020
US average: 54.8%
Direct-purchase
from 17.3% in 2020
US average: 13.8%
from 23.8% in 2020
US average: 18.4%
from 15.0% in 2020
US average: 20.9%
VA health care
from 3.2% in 2020
US average: 2.2%
Any private
from 86.2% in 2020
US average: 67.1%
Any public
from 35.2% in 2020
US average: 36.7%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans Veterans by period of service, 2024
Gulf War (2001 or later) 23%(52)
Gulf War (1990s) 21.2%(48)
Share of the 226 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
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Drill deeper
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Frequently asked
How many people live in Rochester, Illinois? Rochester, Illinois has about 3,766 residents according to the 2024 American Community Survey.
What is the median household income in Rochester, Illinois? The typical household in Rochester, Illinois earns about $117,118 a year. Half of households make more than that, and half make less.
Is Rochester, Illinois expensive? In Rochester, Illinois, the median home is worth about $238,900, and the typical rent is about $1,288 a month.
How educated are people in Rochester, Illinois? About 47.9% of adults age 25 and over in Rochester, Illinois hold a bachelor's degree or higher.
What is the poverty rate in Rochester, Illinois? About 2.5% of people in Rochester, Illinois live below the federal poverty line.
Has Rochester, Illinois grown since 1990? Yes, Rochester, Illinois has grown since 1990. The population has added about 1,059 residents, a change of about 39 percent over that period.
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